Title:
PROCESS AND APPARATUS FOR UREA PRODUCTION
Document Type and Number:
WIPO Patent Application WO/2020/183717
Kind Code:
A1
Abstract:
In a urea synthesis process, temperature distribution in a submerged condenser is reduced. The process includes: synthesizing urea from NH3 and CO2 to generate a urea synthesis solution; by heating the solution, decomposing ammonium carbamate and separating a gaseous mixture containing NH3 and CO2 from the solution to obtain a solution higher in urea concentration than the solution obtained in the synthesizing; with use of a submerged condenser including a shell and tube heat exchange structure including a U-tube, absorbing and condensing at least a part of the gaseous mixture in an absorption medium on a shell side, and generating steam on a tube side with use of heat generated during the condensation; and recycling at least a part of liquid, obtained from the shell side, to the synthesizing, wherein water is supplied to the tube side of the condenser at a mass flow rate that is three times or more of the steam generation rate.
Inventors:
SASAKI KEIGO (JP)
Application Number:
PCT/JP2019/010610
Publication Date:
September 17, 2020
Filing Date:
March 14, 2019
Export Citation:
Assignee:
TOYO ENGINEERING CORP (JP)
International Classes:
C07C273/04; B01J19/00
Domestic Patent References:
WO2013165246A1 | 2013-11-07 | |||
WO2006118071A1 | 2006-11-09 |
Foreign References:
EP1876171A1 | 2008-01-09 | |||
EP1728783A1 | 2006-12-06 | |||
JPH10182587A | 1998-07-07 | |||
EP0834501A2 | 1998-04-08 | |||
EP1035111A1 | 2000-09-13 | |||
EP1035112A1 | 2000-09-13 | |||
US5936122A | 1999-08-10 | |||
US6200540B1 | 2001-03-13 | |||
JP2003104949A | 2003-04-09 | |||
EP1279663A1 | 2003-01-29 | |||
US6518457B1 | 2003-02-11 | |||
EP1876171A1 | 2008-01-09 | |||
US20090062566A1 | 2009-03-05 |
Attorney, Agent or Firm:
MIYAZAKI Teruo et al. (JP)
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